Telephone jack



LSSLIS Nov. 10, 1925 L. l.. JONES` TELEPHONE JACK Filed July-18, 1925 loC INVENTR Lesef L. dones /4 w ATTORNEYS Patented Nov. 10, 1925.`

Lusriiar.. Jonas, or omni., NEW JERSEY.

TELEPHONE Jacx.

Application led July i8, 1925, `Serial No. 44,463.

To all whom z't may concern.'

Be it known that I, LESTER L. JONES, a citizen of the United States, and resident of Oradell, in the county of Bergen and 5 State of NewV Jersey, have invented certain new and useful Im rovements in Telephone Jacks', ofwhich t e yfollowing is a specication.

IThis invention relates to jack structures,

and more particularly to a Itelephone jack..

A prime desideratum of my present inventicn comprehends the provision of animproved telephone jack constructed and designed 'so that the parts thereof, manufacturable at low cost, are related so as to be capable of rapid and accurate assembly to produce a jack structure which possesses a number of important advantages in use. More specifically, the objects of the presentinvention include the provision of a telephone ]'ack in which the supporting, insulating and conducting parts are reduced to a minimum and are coordinated 'to' permit rapid assembly of the parts into aunit in which the conducting elements or spring blades are predetermmedly and accurately spaced; the furtherprovision of a telephone- ]'ack in which4 the spacing of the spring blades is so redetermined during the manubling operation to be carried out with the use of unskilled help at a small cost; the further provision ofan improved telephone jack structure which is designed so as to maintain at a minimum the dielectric leakage between the conducting parts, the latter being so arranged asV to be readily connected in circuit; and the still further probvision of a telephone jack structure of the type referred to which is strong and durable in construction and neat in appearance.

To the accomplishment ofthe kforegoing "and such other objects as may hereinafter appear,y my invention consists in the elements and their relation one to the other. as hereinafter more particularly described and sought to be defined in the claims; reference being had to the accompanying drawings which show the preferred embodiments of my invention, and in which: l

Fig. 1 is a plan view of my improved telefacture of t e parts as to permit the assem phone jack with a part broken away and showing the same attached to a support such Y as a panel,

Fig. 2is a' view of the same taken in crosssection on the line 2-2, Fig. 1,

Fig. 3 is a fragmentary view of the same taken in cross-section Fig. 1,

' Fig. 4 is an enlarged view of the same on the line 3 3,

taken in cross-section on the line 4 4, Fig.

2, and 2 Fig. 5 is a view of parts of the same'showing a modified form thereof.

Referring now more in detail to the drawings, the telephone jack structure of my 1nvention comprises a bracket generally designated as l0, a pair of mating insulating blocks 11 and 12 arranged in superposed ne-v lation on the bracket 10, and a plurality of jack spring blades or leaves 13, 13 of any desired number mounted between and arranged transversely of said blocks, with the,l

l'ceives the` nut 16 for mounting the jack structure on a support such as a panel 17, the thimble serving for receiving and' guiding the usual jackplug 18 into operative position, as clearly shown in Fig. 1 of the,

drawings.

The mating insulating blocks 1-1 and 12 are designed and constructed so as to rmit rapid and to lfacilitate correct assem ly of the jack blades orv leaves, and so as to minimize the surfacedielectric leakage between the blades, especially after the leads or con' In accordance ductors are soldered thereto. with one well-known method of telephone jack manufacture, the blades .are arranged in vvertical superposition separated by insulating sheets, the separation between the blocks 11 and 12 and the latter being duces crevicesy into which the fiux has a ten-- dency to iiow, thus further reducing the dielectric resistivity between the jack springs. The insulating blocks 11 and 12 of my invention are so designed as to obviate these disadvantages; and to accomplish the desired results, the mating blocks 11 and 12 are made of a molded insulation material pro-v ducing outer walls having an impermeable hard smooth finish, into which the flux cannot penetrate, and which impermeable walls may be readily cleaned to increase the surf face resistivity between the springs, the mating blocks being provided with pairs of mating notches 19 and 2O produced during the molding operation, each pair of notches being deslgned for receiving a jack s ring 13. By means of this construction, it wi l be seen that the separation between the jack blades may be accurately predetermined forfacilitatin the rapid `and correct assembly of the b ades,fand that the surface dielectric leakage between the blades may be main" tained ata minimum by the provision of fthe hard impermeable molded finish of the insulating surfaces'.

To further assist in ermitting rapid assemblyv of the parts an to eliminate securing elements, the s ring blades 13 are fixed to and clamped between the insulating blocks 11 and 12 with a dovetailing t, the spring blades 13. and the mating notches 19 and 20 being contoured to produce the dovetailing interen agement between the parts. More speciiical y each of the spring blades 13 is provided with a portion 13 receivable by aV pair of the mating notches 19 and 20, the said portion 13a being contoured to rovide the top and bottom notches 21 an 22 and` the insulating blocks 11 and 12being contoured to` provide integral tongues 23 and 24 which dovetail with the spring blade notches 21--and 22 respectively. Preferably the insulating 'block notches 19 and 20,0f each pair are oppositely tapered with the larger bases of the tapered portions adjoining, as'clearly shown in Fig. 4 of the drawings, and the "clamping ortions 13"L of the spring blades are crimpe v as shown particularly in Figs. 1 and-4 of the drawings, so that the jack blades are received by the rl facture and to' further aid in permitting rapid assembling operation, a single secur- Aing element 14 is utilized .for jolning the blocks together and for attaching the vsame to the bracket 10, the said securing element 14 extending through the said blocks and being threadedly` attached as at 25 to the 'bracket leg 10. To vpermit'the use of a single securing element, the lower insulating block 12 and the bracket 10y are provided with integral mating elements deslgned to I iixthe blocks to the bracket a ainst rotation, and preferably the lower insu ating block 12 is provided withl one or `more integral stud portions 12, preferably four in number, as

shown particularly in Figs. 1 and'3 of the drawings, the said studs being receivable by complemental apertures 10, 10 provided` in the bracket 10.

In Fig. 5 of the drawings, I show a modilication of the pair ofinsulating blocks designed so las to further reduce the surface leaka ey between thef'ack blades.y In this modi cation, the insulating blocks 11 and 12 are constructed so that the outer walls only contact or engage, the inner projections between the mating notches beingv separated by an air s ace.

The met od of making, assembling and using the improved jack structure' o-f my present invention and its many advantages will in the main be fully apparent from the i above detailedldescription thereof. It will be apparent that with the jack spring blades' arranged transversely of the jack structure, y

with the planes of the blades lying normal to theplane of the bracket, the number of blades or leaves used may be comparatively 'large land may be arranged s mmetrically on both sides of the axis ofthe racket without interference, this construction fu'rther- 4 more ermitting ready 'accessibility to ,the

vsulating blocks are so constructed and ref' lated to the supporting Aspring blades as to minimize the crevices and as to produce al hard smooth-surface finish, the construction belng such that the surface leakage between .the spring. blades' is reduced to a minimum.

The provision, moreover, ofthe insulating blocks provided with the positioningstuds,

further permits the use of a single securing 'l device for assembling all of the parts` in secured relation, and-aids in facilitating the assembly positioning of the parts on the bracket. y means, therefore, of the interpable of simple processesof manufacture and assembly and possessing highly advantageous properties in use.

lVhile I' have shown vmy lnvention in the Vpreferred forms, it will be obvious that many changes andfmoditications' may be made in the structure disclosed without departing from the spirit of my invention, de- `fined in the following claims.

I claim: y U

1. A telephone jack structure comprising a bracket having means for. attachingv the same to a panel, a pair of mating insulatmg blocks arranged in superposed relationbn said bracket, a plurality of jack spring blades mounted between and arranged transversely of said blocks with the planes of the blades lying normal to thevplane of s aid bracket, the said insulating blocks being Aprovided with pairs of mating notches and each of said jack blades having a portion receivable, with a dovetailing interengagement by a pair of such notches for securing such blade to and betweeny theinsulating blocks, the said'bracket and the lower of said blocks being provided with mating elements for positioning thev blocks on the bracket, and a securing member joining the blocks together Vand attaching the same to the bracket.'

\ 2. A telephone jack structure comprising a brackethaving leg and foot portions, a panel mounting thimble attached to the foot of said bracket, a pair of mating insulating blocks .arranged in superposed relation on the leglof said bracket, a plurality of jack spring blades mounted between and arranged transversely of said blocks with the planes of the blades lying normal`to the plane of saidbracket leg, the said insulating blocks being provided with pairs of mating notches, each of said jack blades having a portion receivable with a dovetailing fit by a pair of said notches for securing such blade to andv between the insulating blocks, the said bracket leg and the lower of said blocks being provided with integral mating elements for fixing the blocks in positionon the bracket` and a unitary securing element extending through said blocks and threadedly attached to said bracket leg for joining the blocks together and securing the same to the bracket.

3. A telephone jack structure comprising a bracket having means for attaching the same to a panel, a pair of mating impermeable smooth faced blocks madeof molded insulation material arrangedf in vsuperposed relation-on saidbracket, a plurality of jack spring bladesl mounted' between and arranged transversely of said blocksl with the planes of the blades lying normal to the plane of said bracket, the said insulating blocks being provided with pairs vof oppositely tapered mating notches, yeach of said jack blades'having a portion receivable with a dovetailing and clamping fit by a pair of such notchesfor securing such bladeV to and vbetween the insulating blocks, and a securing member joining the blocks together and attaching the same to the bracket.

, 4. A- telephone jack structure comprising a bracket having leg and foot portions, a panel mountin thimble attached to the foot of said brac et, a pair of mating insulating blocks arranged in superposed relation on the leg of said bracket, the lower of said blocks having an integral stud mating with a positioning aperture in said bracket leg, a pluralit of jack spring blades mounted between an arranged transversely of said blocks with the planes of the blades lying normal to the plane of said bracket le the said insulating blocks beingl provi d with pairs of mating notches,

ceivable with a dovetailing fit by a pair of between the insulating blocks, and a single securing element extending through said blocks and threadedly attached to said bracket leg for joining the blocks together and securing the same to the bracket.

5. A telephone jack structure comprising a bracket having leg 'and foot portions, a panel mounting thimble attached tothe foot of said bracket, a pair of impermeable smooth faced mating blocks made of amolded insulation material arranged in superposed relation on the leg of said bracket, the lower ofsaid blocks having a plurality of integral studs mating with positioning apertures in said bracket leg, a plurality of jack spring blades mounted between and a1 ranged transversely of said blocks with the planes of the blades lying normal to the plane of said bracket leg, the said insulating blocks beingl provided with pairs of oppo- -sitely tapered mating notches, each of said jack blades having a portionl receivable with a dovetailing and by a. pair of said notches for securing'such blade to and between the insulating blocks, and a single securing element extending through said blocks and threadedly e attached to said bracket leg -for joining the blocks together and securing the same to' clamping lity said notches for securing such blade to and las the planes of the bladesl mg normal to the and a securing element joining the blocks lane of said bracket, t e ysaid insulating together and attaching the same to the locks being provided with pairs of `mating bracket. 10 notches, each of said jack blades having a` Signed at New York city in the county of 6 portion receivable with a dovetailing it b New York and State of New `York this 16th a pair of said notches for securing sucii day of July, A. D. 1925.. blade to and between the insulatingblocks, LESTER L. JONES. 

